63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/*-*- Mode: C; c-basic-offset: 8 -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <assert.h>
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#include "ratelimit.h"
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#include "log.h"
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/* Modelled after Linux' lib/ratelimit.c by Dave Young
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* <hidave.darkstar@gmail.com>, which is licensed GPLv2. */
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bool ratelimit_test(RateLimit *r) {
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usec_t timestamp;
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timestamp = now(CLOCK_MONOTONIC);
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assert(r);
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assert(r->interval > 0);
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assert(r->burst > 0);
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if (r->begin <= 0 ||
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r->begin + r->interval < timestamp) {
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if (r->n_missed > 0)
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log_warning("%u events suppressed", r->n_missed);
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r->begin = timestamp;
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/* Reset counters */
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r->n_printed = 0;
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r->n_missed = 0;
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goto good;
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}
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if (r->n_printed <= r->burst)
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goto good;
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r->n_missed++;
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return false;
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good:
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r->n_printed++;
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return true;
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}
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